Multi-Function Fluid Measurement System using High-Definition Fiber Optic Sensing

Propulsion systems require rigorous and highly instrumented testing to enable a comprehensive analysis of performance and to minimize risks associated with space flight. Current testing instrumentation methods can be replaced with embedded sensor systems that are used for monitoring remote, hazardous, or inaccessible locations, while reducing cabling and power consumption. The additional information from the embedded sensor system will enable improved analysis techniques that will accelerate propulsion system developments. Luna proposes to develop a multi-function, drop in, sensor capable of simultaneously measuring temperature, heat flux, strain, and pressure in metal piping using embedded distributed fiber optic sensors. During Phase II, Luna will develop the prototype sensor for rocket engine test facility applications. The sensor system will be highly flexible for a variety of extreme conditions (e.g. cryogenic) intended for remote or inaccessible locations. This approach will minimize the cabling associated with multiple independent sensors such as thermocouples and pressure transducers, as well as increase safety benefits inherent in utilizing intrinsically safe fiber optic sensors in the presence of fuel systems.